Left 4 Dead Cheats

Start your game then, press X, B, B, Y, A, A, B, after that restart your game, look in your inventory and you'll have every weapon.

First so u all no, everything is random(almost), however hav everyone attack from a distance after u contact the help.

NOTE: U might want to aim good, use sniper, and never split up, oh and try to find places where they can't reach u.

First, go to ur pistols and press and hold Y and melee, let go of Y and imediatly press (FIRE), wait 5 secs and let go of melle and it should shoot really fast! it will do the same amount of damage as if u shot a whole round except its REALLY fast!

In this section I will cover the Tank and Witch

Tank-Survivor/Versus
The Tank is a powerful infected that can be heard coming with its speical "Tank music" and ability to make the ground shake as it comes closer to survivors. The best way to deal with the Tank is to have a Molotov handy and to have all other infected cleared of the area. This is because one single infected can slow down a survivor and spell potential death. As a Tank in versus, you want to avoid everything that you would do to a Tank in Campaign. Make sure all your teammates are helping you out and once the survivors are sufficiently slowed don, this is when you attack. Try to target survivors with Molotovs so they can't use them when they're incapped, but if they have them in hand and ready, be sure to avoid them. Sometimes tricking them into using it like chasing them, then backing off just as they throw it can be a good way to avoid Molotovs. Remember that grouped survivors are better as the Tank can punch multiple targets. If the survivors are too far away, remember the Tank can throw rocks. These arch so be sure to aim a little above the target to compensate. The farther the target, the more you'll have to aim up wards. a 45 degree angle is farthest you can throw, so anything other than that is out of reach of throwing rocks.


Witch-Survivor/Versus
The Witch has the same rules with being a survivor in versus or campaign, except there is added pressure in versus as the infected players will likely set a trap around it. A shotgun is needed here for a headshot against the Witch. Remember to aim around the hair/neckline for an instant kill. You'll have to rely on your teammates to cover rooftops and keep the zombies off your back. If another player on your team is executing the Witch, be sure that you are covering them sufficiently. If you are an infected, each zombie has its own role. If you are a Smoker, attack the survivor executing the Witch. Hunters should attack the supporting survivors and Boomer should be somewhere inbetween all the action like throwing bile on the survivor carrying the shotgun and charging the others in attempts to block some bullets and explode more boomer bile.

1st u can't get a rocket launcher, 2nd when a witch gets up straight away shoot her head with shotgun, use this to get the achievement.

It takes a while to get the "Zombie Genocidist" achievement(53595 common infected killed). I have found a few ways to help speed the process along. First off, always play single player so you can betray your teammates and kill them without them booting you, or just play with 3 other friends who won't do any killing.

Here are some campaign tips:
1. Always let boomers boom on you. They are horde attracters. When you get boomed on, make sure the boomer leaves so it can recharge so it can boom again. If it starts attacking you, push it away. If it keeps attacking you, just kill it until you find another boomer.
2. Ramdom hordes happen on every part of every campaign, it just takes a while for random hordes to attack, so don't always rush into the next safe house.
3. Always alert hordes that are optional. Optional hordes are hordes set off by car alarms and other noisy things.
4. On the finale of every campaign, there will be 2 hordes and 2 tanks until rescue arrives, then there will be unlimited hordes and tanks. Take some time getting into the rescue veichle and kill some extra zombies before real danger comes close, such as tanks or other special infected.
5a. Special infected do not count toward your kill count, so don't waste time on killing special infected, but you should kill them before they kill you.
5b. Witches do not count toward your kill count either. Try not to even go near them. If they are in your way, try to make a teammate disturb it, unless you've already killed all your teammates. Never go for witch kills unless you are pro at CrOwning them (1 shot kill).

My way: This is the way I easily got the "Zombie Genocidist" achievement:
I play the No Mercy campaign normal mode, single player offline. I get to the beginning of level 5(the finale) and then kill all my teammates. I then open the safe room door, leave, go back in, and close the door. The door is unbreakable (except by tanks)and it is see-through. Boomers can boom through it, and as far as i know, smokers can't smoke you through it, but be cautious anyway. Once a boomer booms you through the safe room door, a lot of common infected come rushing to the door, unable to get in. Try not to kill the boomer. If you do, just wait for another one to show up. You have unlimited ammo, ultimate protecion, and infinite hordes coming running at the unbreakable see-through door. The only bad thing is that it takes a while and can get boring after a while, but it works. I hope I... 

When a hunter in SEWERS b4 they all go in pounce on the 4th person after 3 hav gone in.They can't get to u now.

in chapter 1 lv1 as a smoker go on the building where u can c da car with the alarm,hope u hav good team mates to slow them all down at this point so u can easily constrict the enemy, works for the smoker achievement.

when some one is being destroyed by Normy infecteds, attack them as any infected and if you die ur team and regs will destroy e'm, repeat this a lot to win.

as a survivor pick the shotguns and stay very far away from infecteds, only gun u need.

If u use any gun u want ( for ones where u hav a horde i recommend machine gun) you should win easy

for the use pistols only achievement, grab a 2nd one and use pain pills and use medy packs for easy win win win!!!

The Key to this achievement is let someone die. Then sooner or later you will see a figure in yellow. Find the door with the yellow figure behind it and open the door. Wella achievement unlocked. Note:Do not let someone else do it or you will have to wait until someone dies again.

Accomplish the indicated achievement to get the corresponding number of Gamerscore points:

Helping Hand (20 points): Revive 50 incapacitated Survivors.
Field Medic (20 points): Heal 25 Survivors with a first aid kit.
Pharm-assist (20 points): Give pain pills to 10 Survivors.
My Bodyguard (15 points): Protect any Survivor from an attacking Infected 50 times.
Dead Stop (10 points): Punch a Hunter as he is pouncing.
Cr0wnd (30 points): Kill a Witch with a single headshot.
Untouchables (30 points): No Survivors take damage after contacting the rescue vehicle.
Drag and Drop (20 points): Rescue a Survivor from a Smoker's tongue before he takes damage.
Blind Luck (20 points): You or another Survivor take no damage after being vomited on by a Boomer.
Akimbo Assassin (30 points): Survive an entire campaign using only pistols.
Hero Closet (10 points): Rescue a Survivor trapped in a closet.
Hunter Punter (10 points): Shove a Hunter off of a pinned and helpless Survivor.
Tongue Twister (20 points): Free yourself from a Smoker who has grabbed you with his tongue.
No Smoking Section (15 points): Kill 10 Smokers as they are pulling helpless Survivors.
101 Cremations (20 points): Set 101 Infected on fire.
Do Not Disturb (20 points): Sneak past all Witches in a campaign without disturbing one.
Man vs Tank (30 points): Single-handedly kill a Tank.
Tankbusters (20 points): Kill a Tank without it dealing any damage to a Survivor.
Safety First (30 points): Play an entire campaign with no Survivors taking friendly fire damage.
No-one Left Behind (20 points): Beat a campaign with all 4 Survivors.
Unbreakable (30 points): Finish a campaign without ever being healed.
Witch Hunter (20 points): Kill a Witch without any Survivor taking damage from her.
Red Mist (20 points): Kill 1000 Infected with a mounted machine gun.
Pyrotechnician (20 points): Blow up 20 Infected in a single explosion.
Zombie Genocidest (20 points): Kill 53,595 Infected.
Dead Giveaway (10 points): Heal a fellow Survivor when your own health is below 10.
Stand Tall (20 points): Survive a campaign without being incapacitated.
Zombicidal Maniac (30 points): Survive any campaign on Expert.
What Are You Trying to Prove? (35 points): Survive all campaigns on Expert.
Nothing Special (30 points):... 

when you start playing blood harvest, take either the shotgun or the other one, then kill yourselve falling down a rock that is near there, it will restart the level and you will have or either 8 bullets more if its the shotgun or you will have 50 bullets more if you chose the other weapon, keep doing it until you want ( if you chose this weapon that louis uses on the introductiion, dont over do it while you have a lilttle bit more than 1000 or else it will return back and you will have less than 50 ammo)

please keep in mind that this worked for me on 2 player non connection

in the level of mercy hospital where you go in the lift and it calls a horde instead go all the way to the left of the lift and there will be a garage door a different size keep hitting it (note it will take a bit be patient) it will break leading you into the next area allowing you to skip the lift

As A Smoker, Hide Behind The Car And When The Survivors Are Close Enough, Try To Pull Them Into Car, If You Do It Right The Alarm Will Go Off.

Usually They Won't Shoot You Until The Alarm Is Activated. If It's Not They Probably Won't Shoot You.

To get Cr0wned, you need to kill a witch with a single headshot.

First, find a witch. Then, you have to get behind her with a shotgun. Aim the middle dot directly at her head, and if done right you should get the achievment.

On chapter 3 of the 'No Mercy' campaign, you come across the part with the gas station. If you shoot the pumps of the station with any weapon, even a pipe bomb, it will explode and burst into flames. Just make sure your away from the gas station and the pumps once it explodes, or you will take major damage.

ok on ch 3 of (I think it has to be versus) no mercy have some one jump almost off the top of the ladder before entering the safe room (not to far up or they'll die) then enter the safe room, leave, and help them up.

You will see zombies fight in Blood harvest lvl. 2 at the area near the emergency exit.
you will hear punching sounds when near.

Door pwnage 1: When a Zombie chases you into a room close the door when it is near the entrance. It wil launch the zombie backwards and probably kill it.

Door pwnage 2: Sometimes when killing a zombie through the grated bars of a Safe Room Exit. You will see it's arms dangling from the bars. If you are looking for fun then repeatedly whack it and it will swing back and forth, back and forth.... XD

P.S No doors were harmed during the makings of these Pwnages... LOL XD XD XD

There is a new glitch i found my name is joshua hepner my username on pokemonindigo is jjaymonster. you got to go to apartments on no mercy, now get a weapon and medikit. then you jump off the buiding and die then when you start the game over you will have more ammo you can do this as much times as you want and on multiplayer or single player. if you are a single 13 year old i date you have to be cute and beautiful.

Go to blood harvest on expert so its easy for team members to die by friendly fire, kill team. find an auto shotgun, it does the most damage.then find a tanck, (do not save team) when you see tank switch to easy and keel him